Synchronization is the result of a holistic plan and discipline to the plan. At the factories I visited, it is not just the product on the line that moves; the carts with kitted parts to be assembled and the operator often move together with the line. There is no inventory at the line other than the needed parts and simple two-bin systems of small standard components. Standardization is the heart beat of the system–the routine that makes it all possible. Kaizen is the brain that constantly improve the standard and the workplace. The methods for Kaizen are QC-circles, Nissan’s 4-boxes method and the classical PDCA. Andon makes sure the system is fit; the andon cord is used many times every day to eliminate any hick-ups that might occur. The result is a world-class production system.